#spinal_column__vertebral_column__vertebralcolumn__spine__backbone__back__rachis  the series of vertebrae forming the axis of the skeleton and protecting the spinal cord; "the fall broke his back"
  supertype:  skeletal_structure  any structure created by the skeleton of an organism
  subtype:  notochord  chine
  part of:  axial_skeleton
  part:  spinal_canal__vertebral_canal__vertebralcanal__canalis_vertebralis__canalisvertebrali  the canal in successive vertebrae through which the spinal cord passes
  part:  coccyx__tail_bone  the end of the vertebral column in humans and tailless apes
     part:  coccygeal_vertebra__coccygealvertebra__caudal_vertebra  one of 4 vertebrae in the human coccyx
  part:  vertebra  one of the bony segments of the spinal column
     part:  centrum  the main body of a vertebra
        part:  hemal_arch__hemalarch__haemal_arch  a structure arising ventrally from a vertebral centrum and enclosing the caudal blood vessels
        part:  neural_arch__vertebral_arch__vertebralarch  a structure arising dorsally from a vertebral centrum and enclosing the spinal cord
     part:  apophysis__apophysi  (anatomy) a natural outgrowth or projection on an organ or part such as the process of a vertebra
     part:  transverse_process  one of two processes that extend from each vertebra and provide the point of articulation for the ribs
  part:  intervertebral_disc__intervertebral_disk  a fibrocartilaginous disc serving as a cushion between all of the vertebrae of the spinal column (except between the first two)

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